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    DRILL BIT DESIGN METHOD BASED ON ROCK CRUSHING PRINCIPLE WITH LOCAL VARIABLE STRENGTH
    1.
    发明申请
    DRILL BIT DESIGN METHOD BASED ON ROCK CRUSHING PRINCIPLE WITH LOCAL VARIABLE STRENGTH 有权

    公开(公告)号：US20220374561A1

    公开(公告)日：2022-11-24

    申请号：US17871897

    申请日：2022-07-23

    申请人： SOUTHWEST PETROLEUM UNIVERSITY

    发明人： Guangjian Dong ,  Yingjie Chen ,  Jianhong Fu ,  Kanhua Su ,  Qiang Han

    IPC分类号： G06F30/17 ,  E21B10/43 ,  E21B10/14 ,  E21B10/567 ,  E21B49/00

    摘要： The invention discloses a drill bit design method based on rock crushing principle with local variable strength, including: drill bit is divided into local crushing feature regions; strength mode factors of the local crushing feature regions are calculated; a difference among strength mode factors of the local crushing feature regions is obtained to obtain a vector sum of horizontal cutting forces of the drill bit tooth corresponding to the same group of cutting tooth on the drill bit; treating the difference among the strength mode factors of the local crushing feature region as a target control condition for drill bit design. Based on the rock crushing principle with local variable strength, after dividing the symmetrical cutting tooth into groups, the strength variation factors of the symmetrical position are adjusted and balanced, so that the rock crushing strength of different local crushing feature regions can be changed in a targeted manner.

    MECHANICS CALCULATION METHOD OF DRILL BIT TOOTH CONSIDERING ROCK DYNAMIC STRENGTH AND MIXED CRUSHING MODE
    3.
    发明申请
    MECHANICS CALCULATION METHOD OF DRILL BIT TOOTH CONSIDERING ROCK DYNAMIC STRENGTH AND MIXED CRUSHING MODE 有权

    公开(公告)号：US20220374560A1

    公开(公告)日：2022-11-24

    申请号：US17866461

    申请日：2022-07-15

    申请人： SOUTHWEST PETROLEUM UNIVERSITY

    发明人： Guangjian Dong ,  Ping Chen ,  Jianhong Fu ,  Yingxin Yang

    IPC分类号： G06F30/17 ,  E21B12/02 ,  E21B10/43

    摘要： The invention discloses a mechanics calculation method of drill bit tooth considering rock dynamic strength and mixed crushing mode, including: Step S1: selecting a target drill bit tooth and a target rock, and determining a type of target drill bit tooth, a geometry of the target drill bit tooth, a rock type and rock parameters of the target rock; Step S2: calculating a horizontal cutting force of the target drill bit tooth according to a horizontal cutting mechanics calculation method of drill bit tooth; Step S3: calculating a vertical penetration force of the target drill bit tooth according to a vertical penetration mechanics calculation method of drill bit tooth; Step S4: calculating a resultant force experienced by the target drill bit tooth according to a resultant force calculation method of drill bit tooth. The invention provides a calculation method for accurately obtaining drill bit tooth mechanics under different working conditions.